Infrared receiver with 38 kHz carrier frequency, for use with Parallax IR Transmitter Assembly Kit and more. These products are miniaturized receivers for infrared remote control systems. A PIN diode and a preamplifier are assembled on a lead frame, the epoxy package acts as an IR filter. This infrared receiver is a compatible replacement for the one found in the Boe-Bot and Sumo-Bot Robot Kits. We recommend purchasing replacements in pairs, since models supplied in kits may vary.